[WATCHDOG] VFS clean-up

All watchdog device drivers are VFSs (Virtual File Systems).
We thus return a nonseekable_open(inode, file) when we open the VFS.
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

drivers/char/watchdog/booke_wdt.c

@@ -144,7 +144,7 @@ static int booke_wdt_open (struct inode *inode, struct file *file)
 				booke_wdt_period);
 	}
 
-	return 0;
+	return nonseekable_open(inode, file);
 }
 
 static const struct file_operations booke_wdt_fops = {

drivers/char/watchdog/mpc8xx_wdt.c

@@ -57,7 +57,7 @@ static int mpc8xx_wdt_open(struct inode *inode, struct file *file)
 	m8xx_wdt_reset();
 	mpc8xx_wdt_handler_disable();
 
-	return 0;
+	return nonseekable_open(inode, file);
 }
 
 static int mpc8xx_wdt_release(struct inode *inode, struct file *file)

drivers/char/watchdog/omap_wdt.c

@@ -142,7 +142,7 @@ static int omap_wdt_open(struct inode *inode, struct file *file)
 
 	omap_wdt_set_timeout();
 	omap_wdt_enable();
-	return 0;
+	return nonseekable_open(inode, file);
 }
 
 static int omap_wdt_release(struct inode *inode, struct file *file)